Example for Configuring MPLS OAM for a Static Associated Bidirectional LSP

This section provides an example for configuring MPLS OAM to check the connectivity of a static associated bidirectional LSP.

Networking Requirements

On the network shown in Figure 1, a forward LSP and a reverse LSP are established between LSRA and LSRC. To implement bidirectional protection switching, bind each LSP to the ingress of its reverse LSP to form a static associated bidirectional LSP.

Figure 1 Configuring a static associated bidirectional LSP

Interfaces 1 and 2 in this example represent GE 0/1/0 and GE 0/1/8, respectively.

Configuration Roadmap

The configuration roadmap is as follows:

Establish a static associated bidirectional LSP between LSRA and LSRC.
Enable MPLS OAM globally.
Configure MPLS OAM parameters in the system view on the nodes at both ends of the static associated bidirectional LSP.
(Optional) Enable MPLS OAM on the nodes at both ends of the static associated bidirectional LSP.

Data Preparation

To complete the configuration, you need the following data:

In this example, the LSP from LSRA to LSRC is a forward LSP, and the LSP from LSRC to LSRA is a reverse LSP.

**Table 1** Data preparation
Device	Item	Value
LSRA	Tunnel interface number of the forward LSP	Tunnel10
	Tunnel ID of the forward LSP	100
	Outgoing label of the forward LSP	20
	Name of the reverse LSP	Tunnel20
	Incoming label of the reverse LSP	130
LSRB	Name of the forward LSP	Tunnel10
	Incoming label of the forward LSP	20
	Outgoing label of the forward LSP	30
	Name of the reverse LSP	Tunnel20
	Incoming label of the reverse LSP	120
	Outgoing label of the reverse LSP	130
LSRC	Tunnel interface number of the reverse LSP	Tunnel 20
	Tunnel ID of the reverse LSP	200
	Outgoing label of the reverse LSP	120
	Name of the forward LSP	Tunnel10
	Incoming label of the forward LSP	30

Procedure

Configure a static associated bidirectional LSP.
For configuration details, see Configuration Files in this section.

Enable MPLS OAM globally.

# Enable MPLS OAM globally on LSRA.

[~LSRA] mpls
[*LSRA-mpls] mpls oam
[*LSRA-mpls] commit
[~LSRA-mpls] quit

# Enable MPLS OAM globally on LSRC.

[~LSRC] mpls
[*LSRC-mpls] mpls oam
[*LSRC-mpls] commit
[~LSRC-mpls] quit

Configure MPLS OAM parameters in the system view on the nodes at both ends of the static associated bidirectional LSP.
# Configure MPLS OAM parameters for the ingress on LSRA.
```
[~LSRA] mpls oam ingress Tunnel10 type ffd frequency 3
[~LSRA] mpls oam ingress enable Tunnel10
```
# Configure MPLS OAM parameters for the egress on LSRC.
```
[~LSRC] mpls oam egress lsp-name Tunnel10 type ffd frequency 3 backward-lsp Tunnel20
```
# Configure MPLS OAM parameters for the egress on LSRA.
```
[~LSRA] mpls oam egress lsp-name Tunnel20 type ffd frequency 3 backward-lsp Tunnel10
```
# Configure MPLS OAM parameters for the ingress on LSRC.
```
[~LSRC] mpls oam ingress Tunnel20 type ffd frequency 3
[~LSRC] mpls oam ingress enable Tunnel20
```
If the auto-protocol parameter has been configured for the egress, Step 4 does not need to be performed.
(Optional) Enable MPLS OAM on the nodes at both ends of the static associated bidirectional LSP.
# Enable MPLS OAM for the egress on LSRA.
```
[~LSRA] mpls oam egress enable lsp-name Tunnel10
[*LSRA] commit
```
# Enable MPLS OAM for the egress on LSRC.
```
[~LSRC] mpls oam engress enable lsp-name Tunnel10
[*LSRC] commit
```

Verify the configuration.

After completing the configuration, run the display mpls oam ingress all verbose command to view MPLS OAM information on the ingress of the static associated bidirectional LSP.

# Check the configuration results on LSRA.

<HUAWEI> display mpls oam ingress all verbose
--------------------------------------------------------------------------------

Verbose information about NO.1 OAM at the ingress
--------------------------------------------------------------------------------


LSP basic information:                   OAM basic information:
--------------------------------------- --------------------------------------
Tunnel-name         : Tunnel10        OAM-Index           : 4
Lsp signal status   : Up                 OAM select board    : 9
Lsp establish type  : Static-cr-lsp      Enable-state        : Manual enable 
Lsp ingress lsr-id  : 1.1.1.1            Ttsi/lsr-id         : 1.1.1.1            

Lsp tnl-id          : 100                Ttsi/tunnel-id      : 100               

Lsp-id              : --                 Compatibility Mode  : Router Mode 

OAM detect information:                  OAM backward information:
--------------------------------------- --------------------------------------
Type                : FFD                Share attribute     : Private 
Frequency           : 3.3 s              Lsp-name            : Tunnel20
Detect-state        : Start              Lsp ingress lsr-id  : 2.2.2.2 
Defect-state        : Non-defect         Lsp tnl-id          : 1
Available-state     : Available          Lsp-id              : 1
Unavailable time (s): 0                  Lsp-inLabel         : 20
Packet-priority     : 7                  Lsp signal status   : Up
Bdi-frequency       : Detect frequency          
Hardware Error Info : --                
 
--------------------------------------------------------------------------------

Total OAM Num:                1
Total Start OAM Num:          1
Total Defect OAM Num:         0
Total Unavailable OAM Num:    0

Configuration Files

LSRA configuration file

#
sysname LSRA
#
mpls lsr-id 1.1.1.1
#
mpls
 mpls te
#
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 10.1.1.1 255.255.255.252
 isis enable 1
 mpls
 mpls te
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#
static-cr-lsp egress Tunnel20 incoming-interface GigabitEthernet0/1/0 in-label 130
# 
interface Tunnel10
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 3.3.3.3
 mpls te signal-protocol cr-static
 mpls te reverse-lsp protocol static lsp-name Tunnel20
 mpls te tunnel-id 100
#
static-cr-lsp ingress tunnel-interface Tunnel10 destination 3.3.3.3 nexthop 10.1.1.2 out-label 20 
#
mpls oam ingress Tunnel 10 type ffd frequency 3
mpls oam ingress enable Tunnel10
mpls oam egress lsp-name Tunnel20 type ffd frequency 3 backward-lsp Tunnel10
mpls oam egress enable lsp-name Tunnel20
#
return

LSRB configuration file

#
sysname LSRB
#
mpls lsr-id 2.2.2.2
#
mpls
 mpls te
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.2 255.255.255.252
 mpls
 mpls te
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.2.1.1 255.255.255.252
 mpls
 mpls te
#
interface LoopBack1
 ip address 2.2.2.2 255.255.255.255
#               
static-cr-lsp transit Tunnel10 incoming-interface GigabitEthernet0/1/0 in-label 20 nexthop 10.2.1.2 out-label 30
#
static-cr-lsp transit Tunnel20 incoming-interface GigabitEthernet0/1/8 in-label 120 nexthop 10.1.1.1 out-label 130 #
return

LSRC configuration file

#
sysname LSRC
#
mpls lsr-id 3.3.3.3
#
mpls
 mpls te
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.2.1.2 255.255.255.252
 mpls
 mpls te
#
interface LoopBack1
 ip address 3.3.3.3 255.255.255.255
#
interface Tunnel20
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 1.1.1.1
 mpls te signal-protocol cr-static
 mpls te reverse-lsp protocol static lsp-name Tunnel10
 mpls te tunnel-id 200
#
static-cr-lsp ingress tunnel-interface Tunnel20 destination 1.1.1.1 nexthop 10.2.1.1 out-label 120
#
static-cr-lsp egress Tunnel10 incoming-interface GigabitEthernet0/1/8 in-label 30
#
mpls oam ingress Tunnel20 type ffd frequency 3
mpls oam ingress enable Tunnel20
mpls oam egress lsp-name Tunnel10 type ffd frequency 3 backward-lsp Tunnel20
mpls oam egress enable lsp-name Tunnel10
#
return